Apache attack on compromised server, iframe injected by string replace
- by Quang-Tuan Luong
My server has been compromised recently. This morning, I have discovered that the intruder is injecting an iframe into each of my HTML pages. After testing, I have found out that the way he does that is by getting Apache (?) to replace every instance of
<body>
by
<iframe link to malware></iframe></body>
For example if I browse a file residing on the server consisting of:
</body>
</body>
Then my browser sees a file consisting of:
<iframe link to malware></iframe></body>
<iframe link to malware></iframe></body>
I have immediately stopped Apache to protect my visitors, but so far I have not been able to find what the intruder has changed on the server to perform the attack. I presume he has modified an Apache config file, but I have no idea which one. In particular, I have looked for recently modified files by time-stamp, but did not find anything noteworthy.
Thanks for any help.
Tuan.
PS: I am in the process of rebuilding a new server from scratch, but in the while, I would like to keep the old one running, since this is a business site.
